Engine



Aug. '28, 1945, w, RQSE 2,383,565

ENGINE Filed Oct. 12, 1942 fifarbert WRose INVENTOR.

Patented Aug. 28, 1945 UNITED STATES PATENT OFFICE ENGINE Herbert W. Rose, Cristobal, 0. Z. Application October 12, 1942, Serial No. 461,741

2 Claims.

My invention relates to internal combustion engines, and has among its objects and advantages the provision of novel means for increasing the compression ratio of an engine of predetermined size through the introduction of air under high .pressure to ignite the fuel mixture from the heat of compression at the most advantageous position of the crank shaft and thereby increase the power of the engine.

The figure in the drawing illustrates an engine in accordance with my invention.

In the embodiment selected for illustration, the engine In is of the conventional four-cycle type and includes the usual cylinder l2 provided with a piston I4 connected with the crank shaft l6 through the medium of the connecting rod l8. The drawing illustrates the intake valve 20 only since both the intake valve and the exhaust valve are of conventional structure. The fuel is drawn into the combustion chamber 22 through the medium of a' port 24 controlled by the valve 20.

To the engine III is secured an air compressor 26 through the medium of a bracket 28, which compressor may beof conventional construction and is driven by a chain 30 driven from the crank shaft of the engine. The drawing illustrates the compressor as being provided with a discharging pipe 32 having communication with the port 24, which communication is controlled by a valve 34. This valve is normally biased to a closed position by a compression spring 36 and includes a stem 38 engageable by one end of a rocker arm 40 pivoted at 42 on a bracket 44 attached to the engine. The other end of the rocker arm 40 is engaged by a push rod 48 slidably guided at 48 and engageable by a cam 50 attached to a shaft 52 driven from the crank shaft of the engine, as by a chain 54. A check valve 56 is-interposed in the .pipe 32. In its top end the compresser is provided with a pair of valve controlled inlets 58 which are closed during the upward compression stroke of the compressor piston and open to admit air into the compressor chamber upon reverse movement of the piston. The check valve 56 functions to open the conduit 32 during the compression stroke and to close the same ,during the intake stroke.

In operation, the compressor 26 is driven by the engine It and develops compressed air under high pressure before delivery to the combustion chamber 22 through opening of the valve 34. The cam 50 opens the valve 34 at or about the time the piston l4 reaches top dead center, with the valve 34 remaining open through a portion of the power stroke of the piston for introducing highly compressed air in addition to the fuel mixture already compressed in the cylinder. The comhas reached top dead center and has traveled some distance on its power stroke. This causes the explosion to take place at an advantageous position of the crank shaft It so that an engine of given size may develop more power.

Because of the introduction of compressed air under high pressure, the fuel mixture previously drawn into the engine must be richer than that employed in conventional engines. It will thus be seen that I provide an engine which develops greater power for a given cubic displacement. It is preferred that the compression period incident to the introduction of high pressure air range from fifteen to thirty degrees of crank shaft travel on the power stroke of the piston.

Without furtherelaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. In combination with an internal combustion engine having a combustion chamber, valve controlled fuel intake and exhaust ports opening into the combustion chamber and a piston driven crankshaft, said combustion chamber having an air inlet opening thereinto, of a spring seated valve for controlling the passage of air into the chamber, cam operated rocker mechanism for maintaining the air control valve open during a predetermined period of the operating cycle, an air compressor mounted adjacent the engine having inlet and outlet ports in the top thereof, a conduit connecting the outlet of the compressor with the air inlet in the combustion chamber, a

pressed air introduced into the cylinder is of such pressure as to cause the fuel mixture to ignite from the heat of compression. Thus the fuel mixture is caused to ignite after the piston l4 vertically movable piston mounted in the compressor, a shaft for driving the compressor piston, a sprocket wheel fixed to the compressor shaft. and a sprocket wheel fixed on the engine crankshaft connected with the sprocket wheel of the compressor by a drive chain, said sprocket mechanism being adapted to actuate the compressor piston so as to deliver a charge of compressed air into the compression chamber of the engine in timed relation with the opening of the air inlet valve.

2. In combination with an internal combustion engine having a combustion chamber, valve controlled fuel intake and exhaust ports opening into the combustion chamber and a piston driven crank shaft, said combustion chamber having an air inlet opening thereinto, a spring seated valve for controlling the passage of air into the chamber, an air compressor, a conduit connecting the air compressor with the air inlet in communication with the combustion chamber, means for compressing air in the compressor, and means operated by the crank shaft for opening the spring seated air valve for the passage of compressed air into the cylinder when the piston reaches the outermost position.

HERBERT W. ROSE. 

